If you're looking for good internet, there's no choice but Zain with unlimited internet without fair usage. Experience 48 hours with the device and SIM for free. Pay 200 SAR, refunded in the fourth month. Two months free. Mobily: Unlimited internet without fair usage. Experience 48 hours. The most important thing for internet quality is your location, not just the internet speed. There are activated prepaid unlimited internet SIMs. There are Zain and Mobily modems for sale.